Direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene via van der Pauw geometry

	Direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene via van der Pauw geometry
	Ma, Rui-Song 1,2,3,4; Huan, Qing 1,2,3,4; Wu, Liang-Mei 1,2,3,4; Yan, Jia-Hao 1,2,3,4; Zhang, Yu-Yang 3; Bao, Li-Hong 1,2,3,4; Liu, Yun-Qi 5; Du, Shi-Xuan 1,2,3,4; Gao, Hong-Jun 1,2,3,4
刊名	CHINESE PHYSICS B
	2017-06-01
卷号	26 期号:6
关键词	Graphene Conductivity Mobility Four-probe Measurement Van Der Pauw Method
英文摘要	We report the direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene on SiO2/Si via van der Pauw geometry by using a home-designed four-probe scanning tunneling microscope (4P-STM). The gate-tunable conductivity and mobility are extracted from standard van der Pauw resistance measurements where the four STM probes contact the four peripheries of hexagonal graphene flakes, respectively. The high homogeneity of transport properties of the single-crystalline graphene flake is confirmed by comparing the extracted conductivities and mobilities from three setups with different geometry factors. Our studies provide a reliable solution for directly evaluating the entire electrical properties of graphene in a non-invasive way and could be extended to characterizing other two-dimensional materials.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39003]
专题	化学研究所_有机固体实验室
作者单位	1.Univ Chinese Acad Sci CAS, Inst Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci CAS, Sch Phys Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, CAS Key Lab Vacuum Phys, Beijing 100049, Peoples R China 4.Beijing Key Lab Nanomat & Nanodevices, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ma, Rui-Song,Huan, Qing,Wu, Liang-Mei,et al. Direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene via van der Pauw geometry[J]. CHINESE PHYSICS B,2017,26(6).
APA	Ma, Rui-Song.,Huan, Qing.,Wu, Liang-Mei.,Yan, Jia-Hao.,Zhang, Yu-Yang.,...&Gao, Hong-Jun.(2017).Direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene via van der Pauw geometry.CHINESE PHYSICS B,26(6).
MLA	Ma, Rui-Song,et al."Direct measurements of conductivity and mobility in millimeter-sized single-crystalline graphene via van der Pauw geometry".CHINESE PHYSICS B 26.6(2017).